Cook married a character in a long complicated procedure (9)
I believe the answer is:
rigmarole
'a long complicated procedure' is the definition.
'cook married a character in' is the wordplay.
'cook' becomes 'rig' (I've seen this in other clues).
'married' becomes 'm'.
'character in' becomes 'role' (I've seen this before. I am not sure about the 'in' bit.**).
'rig'+'m'+'a'+'role'='RIGMAROLE'
Can you help me to learn more?
(Other definitions for rigmarole that I've seen before include "Rambling account" , "Complicated business" , "long, tedious business" , "boring series" , "fuss" .)